The Right Way to Weatherstrip a Door

Besides being unpleasant, door drafts force your heating system to work harder (and consume more energy) to keep your home at a consistently comfortable temperature. You can go a long way toward solving the issue by weatherstripping your doors. Here's how to do it the right way.

Door Weather Stripping


Door drafts can be a cause of real discomfort. Besides the immediate unpleasantness of a chilly gust invading the warmth of your home in winter, there’s also the impact that drafts can have on your energy bills. That’s where weatherstripping comes in. According to Energy Star, the installation of weatherstripping can save you up to 20 percent on heating and cooling costs. Best of all, virtually anyone can install weatherstripping; this is definitely not a sophisticated DIY. But to coax the greatest value from its insulating properties, weatherstripping must be installed correctly. Continue reading to learn the right way to go about the project.

First, clean the door and the jamb, removing as much dirt and debris as possible. If any grime remains after scrubbing with soapy water, consider using fine-grit sandpaper to eliminate residual buildup. Once you’ve got the doorway clean, proceed to do some measuring. You need to answer two questions. First, how wide is the gap between the door and jamb? (Be sure to measure twice, once along the side, and again along the top. These measurements might differ.) Second, how wide is the jamb? While the answer to the first question tells you how thick the weatherstripping you purchase can be, the second answer reveals how widePlan on buying enough weatherstripping to run across the width and height of the door, plus about 10 percent extra (just in case).

Door Weather Stripping - Install Detail


Weatherstripping comes in a variety of materials. Each has pros and cons. Felt weatherstripping offers the benefits of being cheap and very easy to cut and install, but because it’s not very durable, it’s best confined to rarely used doors. Marginally more expensive is easy-to-install foam weatherstripping. Though foam wears better than felt, neither boasts the durability of rubber, the most expensive option. Rubber insulates well, but it can be somewhat challenging to install. Unlike the other options, it often must be nailed into place.

With your chosen weatherstripping at the ready, proceed to cut three pieces—one for the top, and two for the sides. If the product features an adhesive back, peel it away and press it into place around the perimeter of the door jamb, not the door itself. Even if your weatherstripping has adhesive, you may wish to reinforce the installation with heavy-duty staples or small tacking nails. Either will help keep the weatherstripping in place over time.

To complete the job, install a sweep along the bottom of the door. The most common type of door sweep consists of a metal band from which a strip of rubber juts down. When the door opens, the rubber flexes so as not to be an impediment, and when the door closes, the rubber provides a strong air seal.

Door sweeps come in standard sizes, but if you cannot find one whose width matches that of your door, you can use a hacksaw to cut the sweep down to size. Attach the right-size sweep to the door using the screws provided. Because these screws tend to be small and not self-tapping, it’s best to predrill holes for them by means of an electric drill/driver. Position the sweep so that it seals tightly against the threshold.

From start to finish, the door weatherstripping process should take no longer than an hour. That’s a small time commitment to ensure that you remain comfortable through the winter, without spending a fortune on to keep the house warm. Though it’s a simple project, weatherstripping really is one of the most effective ways to stop drafts and the discomfort they cause.


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Doors & Windows